We entered the café and sat down by the window, waiting ________.
A．to serve B．to be served
C．serving D．served
With so many exercises ________， the students are having a hard time.
A．finished B．finishing
C．to finish D．being finishing
Whom do you expect to have ________ the baggage to the airport?
A．deliver B．to deliver
C．delivered D．delivering
The airport is far from here, and ________ there on time, you'd better take a taxi.
A．getB．to get
C．gettingD．got
The old couple walked rather slowly, and could be seen, from time to time, to stop and rest, ________ out to sea.
A．to be staringB．stared
C．having staredD．staring
It was unbelievable that the fans waited outside the gym for three hours just ________ a look at the sports stars.
A.hadB．having
C．to haveD．have
